Laminated glass



Aug. 23, 1932. w. F. BROWN 1,873,280

LAMINATED GLASS Original Filed June 28. 1926 w/lbur F Brown PatentedAug; 1932 JUNlT ED sTfA rEs PATENT OFFICE.

WILBUR F. IBROW1\T, OF TOLEDO, OHIO, ASSIGNOR T LIBBEY-OWENS-FORD GLASSGOM- IANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO LAIVHNATED GLASSApplication filed June 2a, 1926; Serial No. 118,985. Renewed December11, 1930.

The present invention relates to laminated glass, and to the process. ofproducing the same.

An important object of the invention is to provide a process forproducing, as anew article of manufacture, asheet of laminated glass,and contemplates the use of. glycerin in obtaining a suitable bondbetween the laminations. 1

Another object of the invention is to provide a process of this naturewhereina'sheet or sheets of glassKmay-loe provided with a skin ofmaterial such as cellulose composition material, which'skin may beprovided with afilm of glycerin'permitting the sheet of glass and skinto be effectively and per-. manently united to a sheet of nonbrittle'ma--terial.-

Other objects and advantages of the in- .20.vention will become apparentduring the course of the following'description. In the drawing whereinlike numerals are employed to designate like parts throughout the same,3

Fig. '1 illustrates diagrammatically the formation of a skin on a sheetof glass,

Fig. -2 illustrates diagrammatically" the application .of a film ofglycerin on the skin, Fig. 3"shows in sectionthe laminations 1 afterthey have been treated and before they have been united, I

Fig. tis a diagrammatic representation of a press .used for uniting thelaminations,

Fig; 5 is afragmentary sectional view of "'35 the finished prdduct andFig.6 is a sumlar Lviewof another form of product... i The numeral 10designates a sheet of glass, the said sheet preferably being transparent. A skin 11 may be formedon the sheet of glass by means of a sprayor the like 12.

y Y ""The skin is preferably a cellulose composition.

7 material, and as shown is applied by dissolving the material in asuitable solvent. Afterthe liquid has been sprayed on the sheet of glass10 or otherwise applied, it is permitted to dry so that practically allsolvents may be removed, leaving a relatively dry skin of materialclosel adhering to the sheet of glass.

In Fig. 2 a of glycerin 13 is being ap- M The film of glycerin may beapplied by means of a brush 14, or it may be sprayed on.

To produce a sheet of non-brittle glass, two

sheets of glass 15and 16, shown in Fig. 3, are united to a sheet ofnon-brittle material 17 The non-brittle material 17, which may be any ofthe well known cellulose composition materials, may also be providedwith a skin or skins 18 and 19, which can be coated with films ofglycerin 2O and 21. After the sheets of glass'have been treated in thismanner the three laminations are superimposed and placed in apress'designated by the numeral 22 and illustrated diagrammatically inFig. 4. The laminations are here subjected to the action of heat andpressure, thepressure being applied preferably centrally thereof firstso that excess glycerin will be expelled from between said laminations.

In Fig;- 5 is illustrated in section the finstood that the thickness ofthe films are ex- In Fig. 6 is shown a'sheet of so-called bullet ishedproduct. It is of course to beunder aggerated, as the amount of glycerinremain ing between the laminations will be very little. .16

proof glass, comprising a central relatively thick 'sheet23, two outersheets 24, andsheets of non-brittle material 25, whicha're united inaccordance with the present invention. The sheet ofnon-brittle'materialneed not necessarily be a'cellulose compositionmaterial, as 'anymaterialhaving substantially the same properties maybe-used. Y It i'sto be understoodfthat the form of the inventionherewithshown and described is I to be taken as the preferred.embodiment of the same, and that various changes in the shape, size andarrangement of parts may be resortedto without departing from thespiritof the invention or the scope of thesubjoined been coated with a film ofglycerin.

2. Asa newarticle of manufacture, a sheet of laminated glass including asheet of glass having a skin of cellulose composition matev and State ofOhio, this rial thereon which has been treated with a film of glycerin.

3. As a new article of manufacture, a shee of laminated glass comprisinga sheet of glass,- a skin thereon, a film of glycerin, and a sheet 1 ofnon-brittle material.

4. As a new article of manufacture, a sheet of laminated glasscomprising two sheets of 7 glass and a sheet ofnon-brittle material, and

a. film of glycerin interposed between the two sheets of I glass andsheet of non brittle material.

5. As a new article of manufacture, a sheet of laminated glasscomprising a plurality of laminations "bonded together by means ofglycerin.

6. As a new article of manufacture, a sheet of laminated glasscomprising two sheets of glass and a sheet of cellulose ester united bya bonding material including glycerin.

Signed at Toledo, in the countyof Lucas, 24th day of June, 1926. WILBURF..BROWN.

